Google font renders differently on 2 separate computers?

I have an Omnigraffle 7.3.1 doc I’m using a Google font in (Roboto). I’m using the same version Omnigraffle at work / home and the same OSX Sierra at work / home. However, when I open this doc at home the font renders very differently for the one I saved at work, for example in a dropdown menu the line height is very different from the original causing the text to run over the dropdown menu area. A lot more. How can this be happening? The only difference between my work / home locations is that at home I have a Retina resolution Dell monitor (1920x1080) as opposed to the one at work, an older Apple Cinema Display 23" (1920x1200).